The SharpTank is a joy to use and a teacher’s best friend. It is a q-u-i-e-t, compact, durable sharpener intended to last a lifetime. Each blade is good for 5000 uses and can be easily replaced or cleaned. The solid metal design and sturdy base allow the sharpener to sit firmly on your desk without the need to clamp or secure it. The q-u-i-e-t function means no more noisy interruptions as students are sharpen their pencils.